Dubbed by Justin Timberlake as the "baby whisperer", Nanny Connie - aka Connie Simpson - has a long list of celebrity clients, including Jessica Alba and Cash Warren, Emily Blunt and John Krasinski and Jessica Biel and Justin Timberlake.

A post shared by NannyConnie™ (@nannyconnie) on Apr 4, 2018 at 2:05pm PDT

Perhaps the most shocking recommendation is drinking a little bit of dark beer.

In an interview with Entertainment Tonight, Connie revealed: "When I started to know that I had a lot of moms that wanted to breastfeed, I had to figure out how to get moms who weren't producing a lot of milk to produce a lot of milk - or how to get them to produce milk that was fatty.

"I went into my little laboratory and I tried to figure it all out. I did Fenugreek and mother's milk, I'd heard all these things... And then dark beer came into the picture, it has to be dark beer because it has a heavier yeast.

"Beer doesn't have the amount of alcohol that you have in a cocktail, so you're not drinking that much. You want the yeast - dark beer has more of the yeast to it than regular beer."